Detailed explanation of the use of === in php_php example

When comparing simple types (such as String int float bool), the judgment is "equal && same type"

$num1 = 123;
$num2 = 123;
$num3 = '123';
var_dump($num1 === $num2);//输出 bool(true)
var_dump($num3 === $num1);//输出 bool(false) 因为$num3是字符串 $num1是整型

When comparing objects, what is judged is "whether they point to the same object"

class Person {
public $name;
}
$p1 = new Person();
$p1->name = 123;
$p2 = new Person();
$p2->name = 123;
var_dump($p1 === $p2);//输出 bool(false),这是俩对象，虽然都是Person类型且值相等
var_dump($p1 == $p2); //输出 bool(true),俩对象的值是一样的。

The above is the use of === in php introduced by the editor. I hope it will be helpful to you. If you have any questions, please leave me a message and the editor will reply to you in time. I would also like to thank everyone for your support of the Script House website!